high resolution height map without loosing data

Questions & Answers
1

Hey

I was wondering how it would be possible to convert a low resolution height map to a high resolution one. I currently have a height map with a resolution of 513x513 but I’d like to scale it up to 2049x2049 to work on further details. But if I change the resolution in the terrain field, I actually use all the heights and so on which I changed earlier.

So I guess that I need to that through script but I couldn’t figure out a good way to do that yet. Anybody an idea how to that?

2

This is a tricky one.

If what you want is to “add” more terrain, I would do something like this:

	void ChangeTerrainResolution (int newResolution)
	{
		Terrain t = Terrain.activeTerrain;
		TerrainData d = t.terrainData;
		float[,] heights = d.GetHeights(0, 0, d.heightmapWidth, d.heightmapHeight);
		
		int previousResolution = d.heightmapResolution;
		d.heightmapResolution = newResolution;
		float[,] newHeights = new float[newResolution,newResolution];
		for(int x = 0; x < previousResolution; x++)
		{
			for(int y = 0; y < previousResolution; y++)
			{
				newHeights[x,y] = heights[x,y];
			}
		}
		d.SetHeights(0, 0, newHeights);
	}

If you want to actually be able to “fill in the gaps”, you will need to interpolate new height values and it will be somewhat more complex.

3

Yeah I want to “fill the gaps” and that’s actually where I’m struggling